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Oct. 27, 1931. A 'VETHE 1,829,379

COMPUTING MACHINE Filed Oct. 20, 1926 2 Sheets-Sheet 1 OCL 27, 1931.VETHE 1,829,379

COMPUTING MACHINE Filed Oct. 20, 1926 2 Sheets-Sheet 2 aw I Cw;

Patented Oct. 27, 1931 PATENT OFFICE ANDERS VETBIE, or OSLO, NORWAYCOMIPUTING MACHINE Application filed October 20, 1926. Serial No.142,953.

This invention relates to computing machines.

The object of the invention is to provide a computing machine adaptedfor effecting both addition and subtraction, which is of simple andrelatively inexpensive construction, of strong and durable construction,and is effective and reliable in operation.

To effect the objects of the invention, my improved computing machinecomprises a frame, shafts mounted therein, a plurality ofcounter-wheels, actuating wheels mounted to turn on said shafts,respectively, said actuating wheels comprising marginal lugs for turningthe same, gearing rendered operative by the lugs on said actuatingwheels when rotated, which connects said counter-wheels in series andeach actuating wheel with a counter-wheel, said counter-wheels havingnumerals on their perimeters, a casing which encloses operative parts ofthe machine provided with sight openings through which the numerals ondifferent counter-wheels, respectively, are exposed in operation, meansfor yieldingly holding said counter-wheels and actuating wheels againstrotation when in positions corresponding to exposure of numerals on saidcounter-wheels through their associated sight openings, respectively,and means for resetting said counter-wheels following operation of themachine.

The invention also comprises the various other features, combination offeatures and details of construction hereinafter described and claimed.

In the accompanying drawings in which my invention is .fullyillustrated:

Fig. 1. is a front view of the machine with a section of the casingbroken away to expose operative parts thereof,

Fig. 2 is a sectional view of the machine on the line 22 of Fig. 1,

Fig. 3 is a fragmentary on the'line 3-3 of Fig. 1',

Fig. 4 is a detached view showing the counter-wheels and operatinggearing there for partly in elevation and partly in section and on'theline 4'4 of Fig. 2,

Fig. 5'is a fragmentary side view of the gearing which connects thecounter-wheels sectional side view in a series and the actuating wheelswith the counter-wheels,

Fig. 6 is a view substantially similar to Fig. 1 illustrating a modifiedconstruction, an

Fig. 7 is a sectional elevation taken substantially on the line 7-7 ofFig. 6.

Describing the invention, in the first instance, with particularreference to Fi ures 1 to 5 of the drawings, in which I have s own whatI now consider to be the preferable embodiment of the invention.

The operative parts of the machine are mounted on a suitable frameconsisting of a base plate 1 and end plates 2, 2, rigidly securedthereto. Said base plate and end plates are referabl made of suitablesheet metal, as s eet stee and may conveniently be formed by usualstamping processes.

Supported in the end plates 2, 2, and preferably securd thereto againstrotation are shafts 3 and 4, both of which are provided with shouldersat their opposite ends and are held against rotation by clamping thembetween said end plates. Simple means for this purpose consist of nuts 5threaded to the ends of the shaft 3 outside of said end plates, whichprovide for clamping said frame plates in firm engagement with shouldersformed on said shaft.

Mounted on the shaft 4 so as to turn freely thereon are a plurality ofcounter-wheels 6, and mounted on the shaft 3 are a plurality of what forpurposes of convenient reference, may be designated actuating wheels 7,said counter-wheels and actuating wheels, respectively, being facsimilesof one another.

A description of one of said counterwheels and one of said actuatingwheels will, therefore, suffice for all and the accompanying descriptionwill, therefore, be in the singular.

As shown, the counter-wheels 6 are stamped from suitable sheet metal,preferably aluminum, so as to form a cylindrical portion 8, providedwith a web portion 9, which is provided at its center with an opening inwhich is secured a hub portion 10 provided with an axial opening adaptedto receive the shaft 4.

Formed on the c lindrica-l surfaceof said counter-wheels an arranged inuniformly spaced relation thereon are numerals arranged in series fromzero to nine, the rela- 5 tion being such that by turning the difi'erentcounter-wheels different numerals on different wheels may be broughtinto transverse alignment.

In accordance with my invention, rotation is adapted to be imparted tosaid counterwheels in either direction by means as follows :Theactuating wheels are mounted on the shaft 3 so as to be separatelyrotatable thereon in both directions, the number of said actuatingwheels being equal to the number of counter-wheels 6. In order that saidactuating wheels may be very light and will thus have very littlemomentum in operation, they are preferably stamped from suitable sheetmetal, as sheet steel, and are skeletoned to form a rim portion 11 andspokes 12 which connect said rim portion with a central disk 13, saidrim portion and spokes being made as light as consistent with necessarystrength.

Formed in the central disk of said actuating wheel is a hole, secured inwhich is a hub 14, which is provided with a bore loosely fitted to whichis a bushing 15, which is slightly longer than the hub 14, thusproviding necessary clearance to prevent binding of said wheels when themachine is assembled and the clamping nuts 5 are tightened.

Formed on the actuating wheels 7 are marginal projections 16. The outerends of said marginal projections 16 are flat, the sides thereofextending radially and being substantially coincident with planespassing through the axis of the shaft 3. Said marginal projections 16are so proportioned that they may conveniently be engaged by a finger ofan operator to turn said wheels.

The counter-wheels 6 are connected is series, and said counter-wheels 6and actuating wheels 7 are connected in pairs by suitable gearing, asfollows :Mounted in rigid parts of the frame of the machine is a shaft17 shown as substantially intermediate the shafts 3 and 4, and whichextends parallel therewithrotatably mounted on which are sleeves 18,secured to opposite ends of each of which is what may be described as apinion 19 and a star wheel 20, said pinion being shown as provided withtwo sets of teeth or notches 21 and 22, which are arranged alternately.The arrangement is such that upon rotation of the actuating wheels 7 inclockwise direction in Fig. 5 the teeth 22 are engaged by the marginalprojections 16 for rotating the pinions, and that upon rotation of theactuating wheels 7 in counter-clockwise direction in said figure theteeth 21 are enraged by said projections 16 for driving the pinions inclockwise direction. Said gearing also comprises a second star wheel 23secured to the hub 10 of the counter-wheel 6, said star wheel consistingof radiating spokes or fingers which project into the ath of movementofthe teeth of the star W eel 20. Thus, as the actuating wheel 7 isrotated in o eration, the marginal projections 16 thereo will engage theteeth or notches- 21 or 22 in the pinion 19 and will impart rotationthereto and also to the sleeve 18 to which said pinion is secured and tothe star wheel 20 secured to the opposite end of said sleeve, rotationof said star wheel 20 operating, in turn, to impart rotation to the starwheel 23 secured to the hub of the counterwheel 6, whereby rotationwill, in turn, be imparted to said counter-wheel.

lso secured to the hub of the counterwheel 6 is a finger 24 which, atthe critical point in every complete revolution of said counter-wheelwill engage a tooth or notch 21 or 22 in the pinion 19 of the gear trainthrou h which rotation is adapted to be imparted denomination, for theusual carrying operation by which said counter-wheel is moved eitherforwardly or backwardly a distance equal to that between adjacentnumerals thereon.

Operative parts of the machine are enclosed in a suit-able casing whichcomprises a cylindrical section 25, the outer surface of which issubstantially flush with the periphery of the rim portions of theactuating wheels 7, and front and back sections 26 and 27, whichcomprise portions 26 and 27 below and above said cylindrical portion 25,which extend substantially radially with reference to the axis of theshaft 3. Said portions 26, 27 form stops with which the finger of theoperator will contact in operating the machine, thus limiting rotationof the actuating wheel 7 in operation.

Formed in the portion 27 of the casing section 27 are sight openings 28,there being a sight opening for each counter-wheel 6 and the relationbeing such that, in positions of rest of said counter-wheels, a numeralon each thereof will be exposed.

An important feature of my improved computing machine is that thecounter-wheels 6, actuating wheels 7, and the gearing connecting thesame willoperate equally well both frontwards and backwards, thusadapting the machine for performing subtraction as well as addition.

The actuating wheels 7, the bushings 18 together with the pinions 19 andthe star wheels 20and also the star wheel 23, are adapted to bemaintained yieldingly in posi tions of rest corresponding to register ofa numeral on each of the counter-wheels with the sight openings 28associated therewith, respectively, by means of springs 29, 30, and

31, respectively, which are adapted to engage adjacent marginalprojections 16 on the to the counter-wheel of next higher .in positionbetween the bushings 15 on which the actuating wheels 7 are mounted.

Said members 32 will operate in an obvious manner, to tie the shafts 3and 4 together and to support the intermediate shaft 17 independently ofthe end plates 2, 2,

of the machine frame, if desired, and will also effectually preventspringing or buckling of said shafts.

As shown, the intermediate shaft 17 is supported entirely by the members32, but may also be provided with bearings in the end frames of themachine, if desired.

As shown, also, said members 32 afford a convenient means for supportingthe casing section 25, which comprises a plurality of separate partspositioned between adjacent actuating wheels 7 and which areproportioned to provide slots of suitable width to receive the rimportions of said actuating wheel,

For convenience, numerals from 1 to 9, designated by the referencenumeral 33, are provided in association with the actuating wheels 7being preferably imprinted in any suitable manner on different parts ofthe casing section 25 in such positions that they will aligntransversely with the marginal projections 16, when in positions ofrest.

In order that adjacent counter-wheels of higher denominations may beactuated by means of the fingers 24 secured to the hubs of Countenwheelsof next lower denominations without rotating the actuating wheelassociated 'with such counter-wheels of higher, denominations, theextreme distances between adjacent marginal projections 16 on theactuating wheels 7 and the diameters of the pinions 19 are soproportioned, and the relative positions of said actuating wheels andpinions are such that, in positions of rest, the marginal projections 16will escape the teeth of the pinions 19, so that said pinions 19 will befree to rotate independently of said rotating wheels. This is animportant feature of myimproved computing machine, since it verymaterially reduces the strain on the operating mechanism during acarrying operation and particularly so when a number of carryingoperations are performed simultaneously, as when 1 is to be added to anumber ending in a series of 9s. In such case, the train of gearing tothe last operated part at the left as shown in Fig. 1 is comparativelylong, so that the elimination of the opcrating wheels 7 and the springs29 from such operationis correspondingly important.

Another characteristic feature of my improved machine resides in thefact that all of the parts of the machine are constructed and arran edto function in both directions, thus provi ing for performing additionand subtraction on the machine, rotation of the actuating wheels 7 inone direction advancing their associated counter-wheels, therebyincreasing the total of the number represented by the numerals exposedthrough the sight openings 28, and rotation of said actuating wheels inthe reverse direction, will reduce the number formed by the numeralsexposed through said sight openings 28.

After a computation has been finished, the machine is adapted to bereset so that the characters zero on all of the counter-wheels will beexposed at the sight openings 28, thus putting the machine in conditionfor a new computation or calculation.

In accordance with my invention, this is effected b means, as followsSecure to the hubs 10 of the counterwheels v6 are pinions 34, androtatably mounted in the end plates 2, 2, of the machine frame is ashaft 35 secured to rotate with which are segmental gears 36, the teethof which are adapted to engage the teeth of the inions 34 when anynumeral other than zero 1s exposed at a sight opening associated with agiven counter-wheel.

The pinions 34 are made of a diameter corresponding to a number of teeththereon equal to the number of numerals on the counterwheel, to wit: 10,a tooth of each of said pinions being cut awa and the pinions 34 andsegmental gear 36 eing made of such relative diameters that, when thepinions 34 are in positions corresponding to exposure of the characterszero (0) at the sight openings 28, a right line passing through the axesof said pinions 34 and segmental gears 38, will pass substantiallythrough the centers of the spaces formed by the cut-away teeth of saidpinions, respectively, and the teeth-of said segmental gears 36 willescape the teeth of the pinions 34, but will engage the teeth of saidpinions when any numerals or characters other than zero are exposed atsaid sight openings.

Thus, when any counter-wheel is in posi tion corresponding to exposureof a numeral other than the character zero at a sight opening androtation is imparted to the shaft 35 and thus to the segmental gears36,. rotation will be imparted to the pinion 34 associated with saidcounter-wheel, thereby turning said counter-wheel until the characterzero is exposed at the sight opening, in which position the teeth of thesegmental gear 36 will pass out of engagement with the teeth of thepinion 35 and the counter-wheel will come to rest with the characterzero exposed at its lit sight opening and the detent spring 30 inengagement with the points of the star-wheel 23. In accordance wlth myinvention rotation ,is adapted to be imparted to the shaft 35 toresetthe machine by means of a train of gears comprising a segmentalgear 37 (Fig. 3) rotatably mounted on the shaft 3 adjacent to the endplate '2 of the machine frame, a pinion 39 secured to the shaft 35 whichcarries the segmental gears 36 and a gear 40 rotatably mounted on a stud41 secured in the end plate 2 and which intermeshes with the teeth ofthe gears 37 and 39.

Rotation is adapted to be imparted to the segmental gear 37 by means ofa lever arm 42 secured thereto, the end of which projects through a slot43 in the cylindrical ortion 25 of the casing of the machine. 11position to be engaged by a finger of the operator to exert a ull on thelever arm 42, the ends of said s ot forming stops, contact of said leverarm with which, limits turning movement of said segmental gear. Thesegmental gear 37 is maintained ieldingly -in position corresponding tofull dlsengagement of the segmental gear 36 from the pinion 34 by acoiled spring 44 applied thereto, one end of which is connected to thesegmental gear 37 and the opposite end thereof to the adjacent member32, displacement of said sprin being prevented by coiling it about thehub of said segmental gear 37.

During operation of the machine the segmental gears 36 are fullydisengaged from the pinions 34 in order that said gears 36 shall notinterfere with free turning movement of the counter-wheels.

As a modification of my invention, I contemplate dispensing entirelywith separate counter-wheels and utilizing the actuating wheels both asactuating wheels and counterwheels, thereby greatly simplifying the machine, particularly as regards the gearing by which counter-wheels ofhigher denominations are operatively connected with those of lowerdenomination, as the units counterwheel with the tens, the tens with thehundreds etc., thereby correspondingly reducing the cost of manufacture.

This modification is illustrated in Figs. 6 and 7 of the drawings, inwhich, so far as can be done without confusion, the same or substantially similar parts are designated by the same reference charactersas in Figs. 1 to 5, to wit :1, designates the base of the machine; 2,2', end plates supported thereon, on which the operative parts of themachine are mounted; 3, a shaft secured in said end plates and whichrigidly connects the same; 5, nuts threaded to the projecting ends ofsaid shaft adapted to clamp said end plates against shoulders formed onsaid shaft, thus binding the frame structure rigidly together; 7,actuating wheels mounted to turn freely on the shaft 3 in bothdirections; 16, marginal projections on said actuating wheels providinmeans for turning the same; 17, a gear sha t the ends of which arereduced, forming shoulders thereon, the reduced ends thereof beingadapted to engage holes in the end plates 2, 2 of the machine, being soproportioned that when the clamping nuts 5 are tightened, the shoulderson said shaft will be clamped between said end frame members and heldagainst rotation: 18, sleeves mounted to turn freely on the shaft 17secured to opposite ends of each of which, respectively, is a pinion 19and a star wheel 20.

Excepting as hereinafter particularly deare substantially similar to thesame or corresponding parts of the preferred embodiment of my inventionshown in Figs. 1 to 5 of the drawings and heretofore described, and willbe readily understood therefrom without a description thereof in detail.

In the modified construction shown in Figs. 6 and 7, the counter-wheelsare formed by cylindrical flanges 50 formed on and which projectlaterally from the rim portions'of the actuating wheels 7, said flangesbearing on their outer cylindrical surfaces, a plurality of series ofnumerals from 0 to 9 arranged in uniformly spaced relation thereon, andthe g number of marginal projections on the different actuating wheelsbeing equal to the total number of numerals on each wheel, that is, thenumber of said marginal projections being a multiple of 10. As shown,also, the pinions 19 are secured to the right hand end of the sleeves 18and the star wheels 20 to the left hand ends thereof, the star wheelsand pinions secured to the adjacent ends of adj acent sleeves beingpositioned in such close proximity to each other that the marginalprojections on a single actuating wheel will engage the star wheel onthe right hand sleeve and the pinion on the left hand sleeve.marginal'projections are so shaped and proportioned that each marginalprojection will engage the points of the star wheel associatedtherewith, while only every 10 marginal projection will engage a toothof said pinion, the relation being such, that when an actuating wheel isturned a distance equal to the circumferential distance between adjacentmarginal projections 16, the counter-flanges 50 will be turned adistance equal to that between adj acent numerals thereon.

To insure continuous engagement of the marginal projections 16 with thepoints of the star wheel 20, the right hand sides 51 of said marginalprojections, which align with said star wheel are made of suitablelength always to engage the points of said star wheel, while, to providefor engagement of every tenth marginal projection with the teeth ornotches of the pinion 19, the left hand sides of said marginalprojections, other than those designed to engage the teeth of Said.

scribed and pointed, all of the foregoing parts said pinions, are cutaway, as shown at 52, so that they will esca e the pinions 19, and theleft hand sides 0 eve tenth marginal projection being made su cientlylong so that they will engage the teeth or notches of said pinions, asshown at 52.

The actuating wheel and thus the counter-- flanges 50 secured theretoare held yieldingly against rotation during periods of rest b means ofspring pawls or detents 53 whic engage adjacent marginal projections 16,and the pinion 19 and star wheel 20 are held against rotation duringperiods of rest by spring pawls or detents 54 applied to adjacent pointsof said star whee, all in substantially the same manner as in the1gpreferred form of the apparatus shown in igs 1 to 5. As shown, thespring pawls or detents 53 and 54 are formed integral with each otherand are supported at the ends of arms 55 on members 32 arran ed betweenadjacent actuating wheels an associated parts,

.and which are provided with holes or openings to receive the shafts 3and 17, respectively.

Operative parts of the machine are enclosed in a casing which issubstantiallg' similar in construction with the casing of t e-preferredform of machine. shown in Figs... 1 to.

5, and the parts thereof are designated b the same reference numerals,to wit :The ront and rear sections are designated by the referencenumerals 26 and 27, and comprises ra dially extending portions 26 and27, which form stops which limit turningmovement of the actuating wheels7 by a finger of the operator. Said casing also comprises a circularsection 25 consisting of separate parts secured to the members 32positioned between the actuating wheels. The separate parts of saidcylindrical casing section 25 are proportioned and are mounted in properposition to define slots through which the marginal projections 16 ofthe actuatin wheels extend, and enclose the portions 0 thecounter-flanges 50 which extend above the radial portions 26, 27, of thecasing of the machine. Also, the separate parts of said casing section25 are provided with sight openings 28 formed therein in convenientposition so that the numerals on the counterflanges 50 will be exposedtherethrough when the actuating wheels are in positions of rest. Toprovide for turning the actuating wheels 7 to expose any numeral fromzero to nine, inclusive, through a sight opening 28 by continuousturning movement of an actuating wheel, the casing of the machine isconstructed and arranged so that at least nine marginal projections 16of each wheel will be exposed for operation.

Also as in the preferred form of the machine, first described, saidmodified machine .is constructed and arranged to be operated in bothdirections, thus providing for performing both addition and subtractionand machine between the radial sections 26 and- 27 thereof, is a bar 57,said bar being pivotally connected to the ends of the shaft 3, whichproject beyond the end frame members 2, 2, by spring arms 58. Formed inthe inner edge of said bar 57 are s aced notches 59 which are insubstantial alignment with the different actuating wheels 7 and areproportioned to permit the passage therethrough of the marginalprojections 16 on the different actuating wheels. When at the forwardlimit of its pivotal movement, the right hand end. of said bar 57 ridesupon a fixed cam 60 formed on the right hand end late 2 which operatestoforce said plate end wise so as to permit the passage through themarginal notches 59 therein of all of the marginal rojections 16 on thedifferent wheels. uch endwise movement of the bar 57 is effected byflexure of the spring arms 58, which are normally under tension adaptedto maintain the right hand end of the resetting bar in contact with theright hand end frame 2, which extends above the casing section 25, inwhich position, the left hand edges of the notches 59 will project intothe path of movement of laterally projecting lugs 61 on every tenthmarginal projection of each wheel, the relation being such, that whensaid resetting bar is moved from its forward position in contact withthe stop surface 26 of the machine casing to its rearward position incontact with the rear stop surface 27, any marginal proj ection carryinga laterally projecting lug 61 will be moved into the plane of the stopsurface 26, 27, extending through the axis of rotation of the shaft 3,and in which position the character zero on all of the counterfianges 50will be exposed at the different sight openings 28. Before beginninganother computation, the resetting bar 57 will be I claim Y 1. In anaddingtand subtracting machine, the combination of a housing, aplurality of toothed operating wheels revolubly mounted upon a commonaxis in said housing with at least nine of the teeth of each operatingwheel projecting from the housing for manual operation of the wheelsthereby, a plural ty of sets of mechanism cooperating with saidoperating wheels respectively and each comprising rotary driving meansrevolubly mounted in said housing in position to be rotated in eitherdirection by the operating wheel of the same set of mechanism, a rotarydevice in each set of mechanism revolubly mounted in said housing,driving connections between the rotary device and the rotary drivingmeans of each set of mechanism, and means in connection with eachset ofmechanism and each carried around by the rotary device of said setadapted by engagement with the rotary driving means of the next adjacentset of mechanism to give said rotary driving means of said other set andthe mechanism driven thereby a single step movement upon the movement ofsaid rotary device past a predetermined critical point.

2. In an adding and subtracting machine, the combination of a housing, aplurality of toothed operating wheels revolubly mounted upon a commonaxis in said housing with at least nine of the teeth'of each operatingwheel projecting from the housing for manual operation o the wheelsthereby, a plurality of sets of mechanism cooperating with saidoperating wheels respectively and each comprising rotary driving meansrevolubly mounted in said housing in position to be rotated in eitherdirection by the operating wheel of the same set of mechanism, a rotarydevice in each set of mechanism revolubly mounted in said housing,driving connections between the rotary device and the rotary drivingmeans of each set of mechanism, and means in connection with each set ofmechanism and each carried around by the rotary device of said setadapted by engagement with the rotary driving means of the next adjacentset of mechanism to give said rotary driving means of said other set andthe mechanism driven thereby a single step movement upon the movement ofsaid rotary device past a predetermined critical point, said last namedmeans of each of said sets of mechanism being so arranged with respectto the rotary driving means of the adjacent set of mechanism that itstands normally out of engagement therewith and is moved into engagementwith said rotary driving means of said adjacent set of mechanism foractuation thereof and again out of such engagement at a single stepmovement of the operating parts.

3. In an adding and subtracting machine, he combination of a housing, aplurality of toothed operating wheels revolubly mounted upon a commonaxis in said housing with at least nine of the teeth of each operatingwheel projecting from the housing for manual operation of the wheelsthereby, a plurality of sets of mechanism cooperating with saidoperating wheels respectively and each comprising a pinion revolublymounted in said housing in position to be rotated in either direction bythe operating wheel of the same set of mechanism, a rotary device ineach set of mechanism revolubly mounted in said housing, drivingconnections between the rotary device and the pinion of each set ofmechanism, and means in connection with each of said sets of mechanismand each carried around by the rotary device of said set adapted byengagement with the pinion of the adj acent set of mechanism to givesaid pinion of said other set and the mechanism driven thereby a singlestep movement upon the movement of said rotary device past apredetermined critical point.

4. In an adding and subtracting machine, the combination of a housing, aplurality of toothed wheels revolubly mounted upon a common axis in saidhousing with at least nine of the teeth of each operating wheel projecting from the housing for manual operation of the wheels thereby, aplurality of sets of mechanism cooperating with said operating wheelsrespectively and each comprising a pinion revolubly mounted in saidhousing on an axis at one side of the axis on which said operatingwheels are mounted and positioned for rotation by the operating wheel ofthe same set of mechanism. a gear in each set revolubly mounted in saidhousing on an axis in triangular relation to said other two axes, asleeve connected with the pinion of each set of mechanism, a second gearon the sleeve of each set of mechanism and each meshing with the firstnamed gear of the same set of mechanism, and means in connection witheach of said sets of mechanism and each carried around by the rotarydevice of such set of mechanism adaptedby engagement with the pinion ofthe next adjacent set of mechanism to give said pinion of said other setand the mechanism driven thereby a single step movement upon themovement of said rotary device in either direction past a predeterminedcritical point.

5. In an adding and subtracting machine, the combination of a housing, aplurality of toothed operating wheels revolubly mounted upon a commonaxis in said housing with at least nine of the teeth of each operatingwheel projecting from the housing for manual operation of the wheelsthereby. a plurality of setsof mechanism cooperating with said operatingwheels respectively and each comprising rotary driving meansrevolublymounted in said housing in position to be rotated in either direction bythe operating wheel of the same set of mechanism, a rotary device ineach set of mechanism revolubly mounted in said housing, drivingconnections between the rotary device and the rotary driving means ofeach set of mechanism, and means in connection with each set ofmechanism and each carried around by the rotary device of said setadapted by engagement with the rotary driving means of the next adjacentset of mechanism to give said rotary driving means of said other set andthe mechanism driven thereby a single step movement upon the movement ofsaid rotary device past a predetermined critical point, the rotarydriving means of each of said sets of mech anism being so arranged as torotate in either direction independently of rotation of the operatingWheel of the same set of mechanism when such rotary driving means isgiven said single step movement by power applied from the adjacent setof mechanism.

In witness that I claim the foregoing as my invention I affix mysignature this 16th day of October, A. D. 1926.

ANDERS VETHE.'

